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Automatic
Identification Syst em
Operator 's
Manual
CoastaI
nations
may use AIS to monitor the movem ent of haz ardous cargoes
and
co
ntrol
commercial
fi
shing
ope rations in
their territ orial
waters. AlS
data can be
logged
au
tomatically for playback
in
investigating
an accide nt, oil spill or other
event. AIS
is
also
a
useful tool
in search and
rescu e (SAR) operations, allowing
SAR
coordinators
to
monitor the
movements
of all surface
ships, a
ircraft and
heli-
copters involved in
the
rescue
effort.
Vessel
Traffic
Systems
Wh
en integrated
with shore-based
vessel traffi c sys
tems (YTS),
Al
S
provid es a
powerful
tool
for monitoring and controlling
the
movement of
vessels
thro
ugh
restricted
harbors
and
waterways.
The
AIS
can augment traditional
radar-based
VTS inst
allations, providing an
Al S
"overlay"
on the rad
ar picture,
or
can provide
a
cost-effective
alternative in areas
where it
is not feasible to establ
ish
radar-based
systems. When integrated with radar, the
AIS
can ensure
continuous
coverage,
even when the
radar
picture is
degraded
by heavy precipitation or other interfer-
ence.
YTS assumes control
0
timeslot
assignments.
AIS data layered on radar
picture
(when
available).
The
AIS
channels can
be
used
to transmit port data,
pilotage, berth assignments,
shipping agency
informati on, tides
and
currents, notices to mariners
and other
information from shore to ship, as well as
ship-to-ship
and ship-to-shore AIS
reports.
It
is
also poss
ible for
the YTS to
broadcast
the
complete
harbor
picture
Version
1.5
135
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